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CVE-2016-1494

Good to know:

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Date: January 13, 2016

The verify function in the RSA package for Python (Python-RSA) before 3.3 allows attackers to spoof signatures with a small public exponent via crafted signature padding, aka a BERserk attack.

Language: Python

Severity Score

Related Resources (15)

http://www.securityfocus.com/bid/79829
https://github.com/sybrenstuvel/python-rsa
https://web.archive.org/web/20210123020914/http://www.securityfocus.com/bid/79829
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html
https://nvd.nist.gov/vuln/detail/CVE-2016-1494
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html
https://github.com/pypa/advisory-database/tree/main/vulns/rsa/PYSEC-2016-10.yaml
http://www.openwall.com/lists/oss-security/2016/01/05/1
http://www.openwall.com/lists/oss-security/2016/01/05/3
https://github.com/sybrenstuvel/python-rsa/commit/ab5d21c3b554f926d51ff3ad9c794bcf32e95b3c
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa
https://www.mend.io/vulnerability-database/CVE-2016-1494

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Input Validation

CWE-20

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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